(Reuters) - An Oklahoma man who had converted to Islam was convicted of murder on Friday in the case of a female co-worker who was beheaded three years ago, after the jury rejected his plea of insanity, local media reported.

A jury also found Alton Nolen, 33, guilty of assault crimes after less than two hours of deliberation in Cleveland County criminal court, the Oklahoman newspaper reported.

Nolan had been suspended from his job at a food distribution plant in the Oklahoma City suburb of Moore, when he carried out the attack on co-workers in September, 2014.